626 NEMATHELMINTHES 



(2) Female with vagina opening near mouth; uteri 



convergent: embryos not striated. Male with 

 spicules dissimilar — -Filariidce. 



(3) Female with vagina in posterior third of body; 



uteri divergent. Parasitic parthenogenetic 

 adult of Slrongyloides. [For free-living adults 

 see C (i).] 



C. (Esophagus with a double muscular bulb :■ — 



(1) Skin smooth ; male with two spicules and accessory 



piece; female viviparous — Free-living adults of 

 Angiostomidi-B. 



(2) Skin deeply striated;, male with one spicule; 

 . . female oviparous — OxyuridcB. 



EGGS OF DOUBTFUL IDENTIFICATION. 



Fig. 266. 



Figs. 263-266.- — Eggs of Doubtful Identification from 

 Human Faeces. 



(From preparations and photographs by J.J. Bell.) 



Fis. 263 AND 265. — Abnormal Eggs probably of Ascaris lumbvicoides. 



